Vulcanizable rubber compositions containing N-(sulfenyl) methacrylamides as scorch inhibitors

A vulcanizable rubber composition comprising sulfur-vulcanizable diene rubber, sulfur-vulcanizing agent, organic vulcanization accelerating agent and, in an amount effective to inhibit premature vulcanization, a compound of the formula ##STR2## in which R and R' are the same or different radicals selected from the group consisting of primary or secondary alkyl of 1-20 carbon atoms, benzyl, cycloalkyl of 5-12 carbon atoms, phenyl or mono-, di-, or tri-substituted phenyl wherein the substituents are lower alkyl, lower alkoxy or halo, or R' is --SR.